EP 2837988 B1 20210407 - Low-noise current source
Title (en)
Low-noise current source
Title (de)
Rauscharme Stromquelle
Title (fr)
Source de courant à faible bruit
Publication
Application
Priority
US 201313966001 A 20130813
Abstract (en)
[origin: EP2837988A2] In one example embodiment, a current source is provided to limit noise and offset. In one embodiment, a source transistor is provided, with current sourced at the drain. A feedback network runs from the source node to the gate. The feedback network produces voltage gain by a transconductance, such as a transistor. Appropriate capacitors are also provided, and two pairs of switches are disposed to provide offset cancelation by toggling between gain and clamp modes in the switched capacitor architecture.
IPC 8 full level
G05F 3/26 (2006.01)
CPC (source: EP US)
G05F 3/262 (2013.01 - EP US); H02M 3/156 (2013.01 - US); H03B 5/12 (2013.01 - US); H03F 3/16 (2013.01 - US); H03F 3/68 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2837988 A2 20150218; EP 2837988 A3 20150722; EP 2837988 B1 20210407; CN 104375557 A 20150225; CN 104375557 B 20161123; US 2015048892 A1 20150219; US 9276468 B2 20160301
DOCDB simple family (application)
EP 14179037 A 20140730; CN 201410396495 A 20140812; US 201313966001 A 20130813